# 1” x 21” Simpson Strong-Tie SDS-max Drill Bit

> Simpson Strong-Tie SDS-max MDMX10021Q, 1” x 21” Shank Drill Bit. Quad Head4x Carbide Drill Bit, offers contractor-grade quality ideal for commercial construction use – now at Nail Gun Depot.

- **URL:** https://www.nailgundepot.com/simpson-strongtie-mdmx10021q-sds-max-drill-bits
- **Breadcrumbs:** Home > 1” x 21” Simpson Strong-Tie SDS-max Drill Bit
- **SKU:** MDMX10021Q
- **Brand:** Simpson Strong-Tie
- **Price:** 73.29 USD
- **Availability:** InStock

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SKU#: MDMX10021Q
BOX COUNT: 1

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![1” x 21” Simpson Strong-Tie MDMX10021Q SDS-max Drill Bits](https://www.nailgundepot.com/media/catalog/product/q/u/quad_1_a_mdmxq_prodpho_pho_prod_sds-maxdrillbit-quadhead_c0_14.jpeg)

![1” x 21” Simpson Strong-Tie MDMX10021Q SDS-max Drill Bits shank](https://www.nailgundepot.com/media/catalog/product/s/d/sds_max_shank_detail_image2_a_sdsmaxshank_featclospho_pho_prod_sdsmaxshankdetail_c0_14.jpeg)

![1” x 21” Simpson Strong-Tie MDMX10021Q SDS-max Drill Bits head](https://www.nailgundepot.com/media/catalog/product/q/u/quad_2_a_mdplq-mdmxq-mdspq_featclospho_pho_prod_drillbit-quadhead-detail_c0_31.jpeg)

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### $73.29

#### COMPATIBLE FASTENERS

[###### 3/8” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx03713-sds-max-drill-bits)

[**SKU#: MDMX03713**](https://www.nailgundepot.com/simpson-strongtie-mdmx03713-sds-max-drill-bits)

Qty/Box: 1

#### $43.87

[###### 1/2” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05013-sds-max-drill-bits)

[**SKU#: MDMX05013**](https://www.nailgundepot.com/simpson-strongtie-mdmx05013-sds-max-drill-bits)

Qty/Box: 1

#### $45.24

[###### 1/2” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05021-sds-max-drill-bits)

[**SKU#: MDMX05021**](https://www.nailgundepot.com/simpson-strongtie-mdmx05021-sds-max-drill-bits)

Qty/Box: 1

#### $58.48

[###### 9/16” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05613-sds-max-drill-bits)

[**SKU#: MDMX05613**](https://www.nailgundepot.com/simpson-strongtie-mdmx05613-sds-max-drill-bits)

Qty/Box: 1

#### $46.97

## PURCHASED TOGETHER

[**SKU#:MDMX05021**](https://www.nailgundepot.com/simpson-strongtie-mdmx05021-sds-max-drill-bits)

[1/2” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05021-sds-max-drill-bits)

Box count: 1

## **$58.48**

[**SKU#:MDMX05621**](https://www.nailgundepot.com/simpson-strongtie-mdmx05621-sds-max-drill-bits)

[9/16” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05621-sds-max-drill-bits)

Box count: 1

## **$64.16**

[**SKU#:MDMX06221Q**](https://www.nailgundepot.com/simpson-strongtie-mdmx06221q-sds-max-drill-bits)

[5/8” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx06221q-sds-max-drill-bits)

Box count: 1

## **$61.93**

[**SKU#:MDMX08121Q**](https://www.nailgundepot.com/simpson-strongtie-mdmx08121q-sds-max-drill-bits)

[13/16” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx08121q-sds-max-drill-bits)

Box count: 1

## **$93.92**

#### PRODUCT OVERVIEW

Professionals love the new contractor-grade Simpson Strong-Tie SDS-max Shank Drill Bit MDMX10021Q 1” x 21” with Quad Head4x. This premium quality, professional-grade tool is ideal for concrete & masonry installation projects. The SDS-max drill bit incorporates a variety of features that enhance its durability and drilling speed, while improving the ease of use. The centering tip featured on most SDS-max bits is a plus for installers because it makes spot drilling nice and easy. Product quality and bit life is extended on this premium device by its chromium-nickel-molybdenum steel alloy body and uniformly brazed carbide inserts.

Designed with strength and reliability, SDS-max drill bits are heat-treated with a shot-peened finish for a strong resistance to bending forces and wear. The finish on these bits simultaneously increases drilling speed and surface hardness. Ease of use is amplified with a chisel-shaped head that easily penetrates material. The 4 x 90° head geometry crushes through rebar to prevent sticking in concrete. You’ll find the high-volume, double-helix design of this quad-head bit highly efficient as its patented, high-performance, reinforced core flute maximizes energy transfer upon use. This compatible bit fits all current and older SDS-max rotohammers from Black & Decker, Bosch, DeWalt, Hitachi, Hilti, Kango, Makita, Metabo and Milwaukee. The MDMX10021Q conforms to ANSI Standard B212.15. It is sold as a box quantity of 1. Drill with confidence using the SDS-max Shank Drill Bit.

SPECIFICATIONS

**Resources**

**[Installation Information](https://ssttoolbox.widen.net/view/pdf/th3x3qrmwx/C-A-2023-p223.pdf?t.download=true&u=jjvoyi%20class=file%20file--pdf)**

**Box Count**
1

**SKU**
MDMX10021Q

**UPC**
707392327301

**Fastener Length**
21"

**Application Type**
Concrete

**Brand**
Simpson Strong-Tie

**Condition**
New

**Tool Compatibility**
SDS-max Rotohammers

**Fastener Treatment**
Shot-peened

**Fastener Shank Diameter**
1"

**Product Color**
Silver

**Fastener Material**
Steel Alloy

**Fastener Head Type**
Quad Head4x Drill Bit

**Rating/Certification Provided**
ANSI Standard B212.15

**Fastener Shank Type**
SDS-max

**Manufacturer's Warranty**
Limited

**Item Length**
21"

**Model**
SDS-max Drill Bits

**Product Type**
Carbide Drill Bits

**Special Offer**
No

#### QUESTIONS & ANSWERS

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#### REVIEWS

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#### TECHNICAL RESOURCES

**[Installation Information](https://ssttoolbox.widen.net/view/pdf/th3x3qrmwx/C-A-2023-p223.pdf?t.download=true&u=jjvoyi%20class=file%20file--pdf)**

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_Source: [Nail Gun Depot](https://www.nailgundepot.com/)_
_Generated: 2026-10-20T22:49:01.954Z_